this time, he left the inaugural-size serenade to none other than jennifer hudson. the first couple dancing cheek to cheek. and the first lady, stunning in a ruby red jason wu gown. and like four years ago, the obamas turned to a who's who of popular performers. this is the hottest ticket in all of washington. we've got one. let's check out this party. from alicia keys, who put a presidential twist on her hit song. ♪ obama's on fire >> reporter: to other a-listers, like brad paisley and stevie wonder. ♪ very superstitious >> reporter: so what's the review on the first lady's dress? >> amazing. beautiful. >> reporter: this year, instead of ten balls, just two. in one room, more than 30,000 people dancing the night away, from sea to shining sea, of sequins. in another, the party went on military style, at the commander in chief's ball. >> you all dress up pretty nice. >> reporter: the glitz and glamour overnight capped off a full day of pomp and pageant -- pageantry, with kelly clarkson belting out patriotism on the capitol steps. later tweeting out this picture f